A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
All on a sudden ( হঠাৎ ) All on a sudden a tiger came out of the bush.
Sink in ( আবদ্ধ হওয়া, ডুবে যাওয়া ) He sank in mud or the ship sank into the sea.
At one’s wit’s end ( হতবুদ্ধি ) He was at his wit’s end and did not know what to do.
when pigs fly ( কখনও না ) I will help you when pigs fly
By hook or by crook ( যে কোন উপায়ে ) You must do this work by hook or by crook.